Quality, not quantity. But there should be a reasonable cap.
That link that Lulu's mom gave you has answers all over the page. IMO, the amount of words is less meaningful than the quality of your writing. What you cap it at is up to you. Some stories deserve more words than others, some deserve more pictures and less words.
Your second to last post has 948 words:
A story about a kitty that found its way into your home. You left me hanging at the end. Purposely. Hmm... what does that do to a reader? There is a rule of thumb amongst writers not to manipulate a reader. AI felt manipulated when you purposely said we had to come back to hear the ending. Some will pay you back by not returning. :-(
Your last post was 1214
The "epic" ending to what happened to the kitty. I wasn't at your blog until I saw this thread. And by then, I forgot about the kitty. What I wanted was your word count. Ok, now I'm on your blog again and now I remember ... oh yeah, that cat. What happened to that kitty? You've got minute details. All I want to know is if the cat will have a home. So I scrolled all the way to the bottom without reading anything else, just to know what happened. I missed 1200 words, just to read 14.
Why am I telling you this? What I'm describing is exactly what writers of publications do, in meetings. They sit at a roundtable and try to figure out --how do we keep our readers? Something as simple as having to turn a page (where it says, 'continued on p. 98') will deter some readers, so they purposely design their publications in ways that will keep their readers reading. What you're asking here is actually a thesis question.
IMO, both of these posts could have been written in 500 words, edited very well. You could also have written it in 1000 words, being more detailed, edited very well.
:-) KEEP GOING, you have a wonderful personality